Based on the fine recommendations of the 'Fire I did a little research and found what I may be looking for.
Weatherby Vanguard H-Bar
20" #3 contour barrel threaded for a suppressor(if I ever get one...).
Hinged floorplate, only 40" OAL for the rifle which is an inch shorter than the Montana. Sounds about perfect and I see they go for under $600 on-line.
http://www.weatherby.com/products/rifles/vanguard/vanguardr-weatherguard-h-bar.html Everyone likes what they like but my vote still goes for the CZ Carbine.
I know you say magazines give you heartburn but the CZ comes with two.
I can't see how changing magazines is any more cumbersome than feeding a few more rounds from the top.
Two magazines, controlled round feed, 9 twist, hammer forged 18.5" barrel well known for accuracy, 37.4" OAL, fully adjustable double set trigger, and under 6#.
That's a lot of rifle for the money as far as I'm concerned.
Course the Vanguard does have a "Griptonite" stock so there's that.
http://www.gunbroker.com/item/626128121